LOWPAN_IPHC_MAX_HEADER_LEN   79 include/net/6lowpan.h 					 LOWPAN_IPHC_MAX_HEADER_LEN +	\
LOWPAN_IPHC_MAX_HEADER_LEN  159 net/ieee802154/6lowpan/core.c 	ldev->needed_headroom = LOWPAN_IPHC_MAX_HEADER_LEN +